Method Enabling an Rn to Support Multiple Wireless Access Systems

1. A method performed by a base station supporting multiple wireless access systems, the method comprising: receiving, from a mobility management element (MME), a first message to establish evolved radio access bearers (ERABs); transmitting, to a relay node (RN), a second message to establish radio bearers (RBs) corresponding to each of the ERABs; receiving, from the RN, a third message indicting an RB establishment response; and transmitting, to the MME, a fourth message indicating an ERAB establishment response, wherein the base station supports multiple access network type based on the ERABs, the RN supports the multiple access network type based on the RBs, and the multiple access network type includes a long term evolution (LTE) access network and a non-LTE access network, and wherein each bearer corresponds to each access network type of the multiple access network types.

2. The method of claim 1 , wherein access network information indicating the access network type corresponding to the each bearer is included in at least one of the first message, the second message, and the third message.

3. The method of claim 1 , wherein the first message comprises: an initial context setup request, an ERAB establishment request, or an ERAB modification request.

4. The method of claim 1 , wherein the second message comprises an RRC connection re-configuration request.

5. The method of claim 1 , further comprising: receiving, from the RN, data by using an RB corresponding to the access network type through which the data is received; and transmitting, to the MME, the data by using an ERAB corresponding to the RB for transmitting the data.

6. A method performed by a relay node (RN) supporting multiple wireless access systems, the method comprising: receiving, from a base station, a first message to establish radio bearers (RBs); and transmitting, to the base station, a second message indicating an RB establishment response, wherein the base station supports multiple access network type based on evolved radio access bearers (ERABs), the RN supports multiple access network type based on the RBs, and the multiple access network type includes a long term evolution (LTE) access network and a non-LTE access network, and wherein each RB of the RBs corresponds to each access network type of the multiple access network types.

7. The method of claim 6 , wherein access network information indicating the access network type corresponding to the each RB is included in at least one of the first message or the second message.

8. The method of claim 6 , wherein the first message comprises an RRC connection re-configuration request.

9. The method of claim 6 , further comprising: receiving, from a terminal, data; and transmitting, to the base station, the data by using an RB for corresponding to the access network type by which the data is received.

10. A method performed by a target base station supporting multiple wireless access systems, the method comprising: receiving, from a mobility management element (MME) or a source base station, a first message to establish evolved radio access bearers (ERABs) during a handover; receiving, from the MME or the source base station, access network information indicating an access network type corresponding to each of the ERABs established by the target base station; and receiving, from a relay node (RN), data by using a radio bearer (RB) corresponding to the access network type through which the data is received, wherein the target base station supports multiple access network type based on the ERABs, the RN supports multiple access network type based on the RBs, and the multiple access network type includes a long term evolution (LTE) access network and a non-LTE access network, and wherein each RB of RBs established on the RN corresponds to each access network type of the multiple access network types.

11. The method of claim 10 , when the handover is S1 handover, the first message is a handover request message transmitted by the MME.

12. The method of claim 10 , when the handover is X2 handover, the first message is a handover request message transmitted by the source base station.

13. The method of claim 10 , further comprising: transmitting, to the MME, the data by using an ERAB corresponding to the RB for transmitting the data.

14. A relay node (RN) in a wireless communication system, the RN comprising: at least one processor; a database; and a transceiver, wherein the at least one processor is configured to receive, from a base station, a first message to establish radio bearers (RBs), and transmit, to the base station, a second message indicating an RB establishment response, wherein the base station supports multiple access network type based on evolved radio access bearers (ERABs), the RN supports multiple access network type based on the RBs, and the multiple access network type includes a long term evolution (LTE) access network and a non-LTE access network, and wherein each RB of the RBs corresponds to each access network type of the multiple access network types.

15. The RN of claim 14 , wherein access network information indicating the access network type corresponding to the each RB is included in at least one of the first message or the second message.